The best strings made today use 452X fiber and I've seen some good looking ones come into my bow shop. I'm too busy to build many of my own but am very pleased with this fiber.
Some of the best looking production strings I have seen have come from Winner's Choice or Stone Mountain. My Pearson/McPherson Bows have Vapor Trail strings on them and are nice as well.
I do most of my restringing with Zebra because it's a good string but it does stretch, it's just twisted in a way that the stretch is "balanced". Zebra uses a fiber similar to BCY 8125 just like most Winner's Choice Strings except they do no pre-stretch them like WC. There is a string made by Zebra called a Tiger Twist and it uses the BCY 452 and will stretch less. The Zebra Barracuda is of similar quality to a Winner's Choice.
http://www.zebrastrings.com/home/product...tegoryIDMain=92